-43- This document, and the opinions, analysis, evaluations, or recommendations contained herein are for the sole use and benefit of the contracting parties.
There are no intended third party beneficiaries, and Jacobs Consultancy shall have no liability whatsoever to third parties for any defect, deficiency, error,
omission in any statement contained in or in any way related to this document or the services provided.
Equipment Scope Calendar Year
2008 Frequency24
Capacitor
Bank
Cabinet Heaters / Vac. Oil Switch, Thermography Years
Voltage
Regulator
Monitor Output Voltage ,Visual, Oil DGA, Oil Quality Test,
Thermography, Calibrate Voltage Control
5 Weeks - 1 Year
Switch, Motor
Operated
Visual, Thermography, Operate/Inspect/Lubricate, Contact
Resistance (Ductor Test), Blade and Hinge Assembly
Maintenance, Check Cabinet Heaters
5 Weeks - 12
Years
Reclosers
(Substation)
Visual Inspection, Check Contact Erosion Wear Indicator,
Inspect Operator Mechanism, Inspect Recloser Control
Cabinet, Oil Dielectric Test, Contact Resistance (Ductor)
Test, Mechanism Lubrication, Control Battery
Replacement, Check Cabinet Heaters, Thermography,
Functional Operations Check
5 Weeks - 3
Years
o Pole Inspections – ComEd uses a formal two-pronged pole inspection process:
For the visual inspection program conducted by line inspectors, the
inspectors complete a 24 point inspection covering pole, pole top
equipment and crossarms, conductor, clearances, animal protection, guy
wires and vegetation. These inspections are conducted on a 4-year cycle
for 4 kV and 12 kV circuits and on a 2-year cycle for 34 kV. Pole
sounding is not a component of these inspections, nor is a detailed
estimate of vegetation encroachment.
OSMOSE is contracted to conduct ground-line inspections on about
50,000 poles annually, effectively a 26-year cycle. The results of these
inspections are provided in a weekly report, and required corrective
maintenance (pole replacements or reinforcements) are entered into
PassPort. While ComEd has performed safety audits on OSMOSE crews,
they have not conducted quality assurance audits, although OSMOSE
has its own inspectors. ComEd is planning to implement a random
inspection in the next year.
o Vegetation Management - ComEd uses a Cyclic Trimming Process25 . The
objective is to trim all the trees under and immediately adjacent to the primary
conductors and associated neutral or secondary conductors that have the
potential to contact the primary conductors within the maintenance cycle. The
current preventive maintenance cycle is 48 months26. The work is planned and
managed through source substation projects (the substation from which the
circuits to be trimmed emanate) with the ultimate goal of reducing long-term
costs and maintaining system reliability. Clearances are based on conductor
25 DR-139
26 DR-005